Dec 06 14:11:04.482 INFO testing EthanTheMaster/sudoku_solver against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 14:11:04.483 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 14:11:04.906 INFO [stdout] 3fa2f4d21a2c197ab6c67a19d7b769316c2e97f3f864b9ec296324477074b918
Dec 06 14:11:04.909 INFO running `"docker" "start" "-a" "3fa2f4d21a2c197ab6c67a19d7b769316c2e97f3f864b9ec296324477074b918"`
Dec 06 14:11:06.227 INFO [stderr] usermod: no changes
Dec 06 14:11:06.279 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:06.921 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 06 14:11:06.921 INFO [stderr]    |
Dec 06 14:11:06.921 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 06 14:11:06.921 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:06.921 INFO [stderr]    |
Dec 06 14:11:06.921 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:06.921 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 06 14:11:06.921 INFO [stderr]     |
Dec 06 14:11:06.921 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 06 14:11:06.921 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:06.921 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 06 14:11:06.921 INFO [stderr]     |
Dec 06 14:11:06.921 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 06 14:11:06.921 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:06.921 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 06 14:11:06.921 INFO [stderr]     |
Dec 06 14:11:06.921 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 06 14:11:06.921 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:06.921 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 06 14:11:06.921 INFO [stderr]     |
Dec 06 14:11:06.921 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:06.921 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:06.921 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 06 14:11:06.921 INFO [stderr]     |
Dec 06 14:11:06.921 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:06.921 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `idx`
Dec 06 14:11:06.921 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 06 14:11:06.921 INFO [stderr]    |
Dec 06 14:11:06.921 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 06 14:11:06.921 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.921 INFO [stderr] warning: unused variable: `val`
Dec 06 14:11:06.921 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 06 14:11:06.921 INFO [stderr]    |
Dec 06 14:11:06.921 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 06 14:11:06.921 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 06 14:11:06.921 INFO [stderr] 
Dec 06 14:11:06.976 INFO [stderr] warning: variable does not need to be mutable
Dec 06 14:11:06.976 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 06 14:11:06.976 INFO [stderr]    |
Dec 06 14:11:06.976 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 06 14:11:06.976 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 06 14:11:06.976 INFO [stderr]    |             |
Dec 06 14:11:06.976 INFO [stderr]    |             help: remove this `mut`
Dec 06 14:11:06.976 INFO [stderr]    |
Dec 06 14:11:06.976 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 14:11:06.976 INFO [stderr] 
Dec 06 14:11:08.012 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
Dec 06 14:11:08.012 INFO [stderr] su: No module specific data is present
Dec 06 14:11:08.901 INFO running `"docker" "inspect" "3fa2f4d21a2c197ab6c67a19d7b769316c2e97f3f864b9ec296324477074b918"`
Dec 06 14:11:09.163 INFO running `"docker" "rm" "-f" "3fa2f4d21a2c197ab6c67a19d7b769316c2e97f3f864b9ec296324477074b918"`
Dec 06 14:11:09.485 INFO [stdout] 3fa2f4d21a2c197ab6c67a19d7b769316c2e97f3f864b9ec296324477074b918
Dec 06 14:11:09.490 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 14:11:09.932 INFO [stdout] f9c1a0be35e117a5a17ff2581af33243701051c97ea4946ce97b965514e3b219
Dec 06 14:11:09.932 INFO running `"docker" "start" "-a" "f9c1a0be35e117a5a17ff2581af33243701051c97ea4946ce97b965514e3b219"`
Dec 06 14:11:11.492 INFO [stderr] usermod: no changes
Dec 06 14:11:11.554 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:12.248 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 06 14:11:12.248 INFO [stderr]    |
Dec 06 14:11:12.248 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 06 14:11:12.248 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:12.248 INFO [stderr]    |
Dec 06 14:11:12.248 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:12.248 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 06 14:11:12.248 INFO [stderr]     |
Dec 06 14:11:12.248 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 06 14:11:12.248 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:12.248 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 06 14:11:12.248 INFO [stderr]     |
Dec 06 14:11:12.248 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 06 14:11:12.248 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:12.248 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 06 14:11:12.248 INFO [stderr]     |
Dec 06 14:11:12.248 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 06 14:11:12.248 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:12.248 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 06 14:11:12.248 INFO [stderr]     |
Dec 06 14:11:12.248 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:12.248 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:12.248 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 06 14:11:12.248 INFO [stderr]     |
Dec 06 14:11:12.248 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:12.248 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:12.248 INFO [stderr] 
Dec 06 14:11:12.248 INFO [stderr] warning: unused variable: `idx`
Dec 06 14:11:12.248 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 06 14:11:12.248 INFO [stderr]    |
Dec 06 14:11:12.249 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 06 14:11:12.249 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 06 14:11:12.249 INFO [stderr] 
Dec 06 14:11:12.249 INFO [stderr] warning: unused variable: `val`
Dec 06 14:11:12.249 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 06 14:11:12.249 INFO [stderr]    |
Dec 06 14:11:12.249 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 06 14:11:12.249 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 06 14:11:12.249 INFO [stderr] 
Dec 06 14:11:12.292 INFO [stderr] warning: variable does not need to be mutable
Dec 06 14:11:12.292 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 06 14:11:12.292 INFO [stderr]    |
Dec 06 14:11:12.292 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 06 14:11:12.292 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 06 14:11:12.292 INFO [stderr]    |             |
Dec 06 14:11:12.292 INFO [stderr]    |             help: remove this `mut`
Dec 06 14:11:12.292 INFO [stderr]    |
Dec 06 14:11:12.292 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 14:11:12.292 INFO [stderr] 
Dec 06 14:11:12.592 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Dec 06 14:11:12.592 INFO [stderr] su: No module specific data is present
Dec 06 14:11:13.256 INFO running `"docker" "inspect" "f9c1a0be35e117a5a17ff2581af33243701051c97ea4946ce97b965514e3b219"`
Dec 06 14:11:13.496 INFO running `"docker" "rm" "-f" "f9c1a0be35e117a5a17ff2581af33243701051c97ea4946ce97b965514e3b219"`
Dec 06 14:11:13.784 INFO [stdout] f9c1a0be35e117a5a17ff2581af33243701051c97ea4946ce97b965514e3b219
Dec 06 14:11:13.790 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 06 14:11:14.328 INFO [stdout] aafdbb213861b8028d3714d95b9001b6dca082d1336a8e2e54521611f041c59e
Dec 06 14:11:14.330 INFO running `"docker" "start" "-a" "aafdbb213861b8028d3714d95b9001b6dca082d1336a8e2e54521611f041c59e"`
Dec 06 14:11:15.608 INFO [stderr] usermod: no changes
Dec 06 14:11:15.669 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 06 14:11:15.676 INFO [stderr]      Running /target/debug/deps/sudoku_solver-b7c002426af1e057
Dec 06 14:11:15.688 INFO [stderr] su: No module specific data is present
Dec 06 14:11:15.688 INFO [stdout] 
Dec 06 14:11:15.688 INFO [stdout] running 0 tests
Dec 06 14:11:15.688 INFO [stdout] 
Dec 06 14:11:15.688 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 14:11:15.688 INFO [stdout] 
Dec 06 14:11:16.628 INFO running `"docker" "inspect" "aafdbb213861b8028d3714d95b9001b6dca082d1336a8e2e54521611f041c59e"`
Dec 06 14:11:16.896 INFO running `"docker" "rm" "-f" "aafdbb213861b8028d3714d95b9001b6dca082d1336a8e2e54521611f041c59e"`
Dec 06 14:11:17.272 INFO [stdout] aafdbb213861b8028d3714d95b9001b6dca082d1336a8e2e54521611f041c59e